ALEXANDRIA, Va., June 17 -- United States Patent no. 12,317,048, issued on May 27, was assigned to AAC Microtech (Changzhou) Co. Ltd. (Changzhou, China).
"Sounding device" was invented by Zhang Ren (Shenzhen, China) and Zhiwei Zhong (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a sounding device. The sounding device includes a frame, a first vibration system having a first diaphragm and a first voice coil, a second vibration system, a magnetic circuit system with a first magnetic gap and a second magnetic gap, and an inner sounding cavity, a support ring, and an insertion member. Airflow generated by the vibration of the first diaphragm pushes the second diaph...